On Wed, Oct 28, 2015 at 1:59 AM, Vagrant Cascadian <[email protected]> wrote: > On 2015-10-27, Fabio Estevam wrote: >> On Tue, Oct 27, 2015 at 5:49 PM, Vagrant Cascadian <[email protected]> >> wrote: >> >>> +#define BOOT_TARGET_DEVICES(func) \ >>> + func(MMC, mmc, 0) \ >>> + func(MMC, mmc, 1) \ >>> + func(USB, usb, 0) \ >>> + func(PXE, pxe, na) \ >>> + func(DHCP, dhcp, na) >> >> >> I never used config_distro_bootcmd, so let me ask you: is there a TFTP >> variant for func() as well? > > Both PXE and DHCP download an extlinux-style config (or boot script) via > TFTP, which then decides what kernel, initrd, dtb, etc. to load. Other > boot methods work similarly, loading from local media. > > >> In the current script we can switch from TFTP/DHCP very easily. > > You can override the default boot order by changing the boot_targets variable. > > >> Also, how can do we switch from booting the rootfs from mmc versus NFS mount? > > That would be defined in the extlinux-style config or boot script. > > > So, it doesn't exactly replicate the prior functionality, though it > provides similar methods. > > This is why I originally proposed to make it fallback to the old > behavior, then you could set boot_targets to empty and still have the > old style booting; but opinions may differ on all this. :) > > Mostly, I'm seeking to standardize on a common configuration for as many > boards as we can in Debian (and ideally in upstream u-boot, to minimize > long-term maintenance), so that various supported boards at least behave > similarly by default. > > A lot of goals and functionality is documented reasonably well in > doc/README.distro.
Agreed and I think for community and reference boards the distro environment provides some benefits as standardization and flexibility. -- Otavio Salvador O.S. Systems http://www.ossystems.com.br http://code.ossystems.com.br Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
